Year	Number
1996	4790.04
1997	5158.2
1998	5207.28
1999	4792.49
2000	5063.27
2001	5159.27
2002	5168.99
2003	5297.91
2004	5774.19
2005	6751.28
2006	7173.66
2007	7691.47
2008	7904.71
2009	8733.72
2010	8949.95
2011	9597.54
2012	10156.04
2013	10212.45
2014	10449.72
2015	10363.98
2016	11133.87
2017	11672.12
2018	12044.24
2019	12407.49
2020	13262.07